Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

UNITED · FLIGHT UA 943 LANDED 3:15 PM ET, ~1 MIN LATE · SCHEDULED TIME UNKNOWN

UA 943 · LIS → IAD

took off 12:41 PM WEST · landed 3:15 PM ET (scheduled time unknown)
Forecast issued Wed 10:00 PM ET · 14h after departure

Odds over time

Arrive at IAD more than 15 minutes late?
8% chance · ±0 pts +0 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 3% 6% 9% 12% 1.1d 12h 6h Departs Lands